... 嵌刃钻头 inserted drill 三刃钻头 six point bit; three point bit; three-point bit; three-wing bit 双刃钻头 two point bit ...
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three point bit 三刃钻头
three point bit three-wing bit 三刃钻头
three point near-bit reamer 三点式近钻头扩眼器
three point neat-bit reamer 三点式近钻头扩眼器
three point dull bit grading 三位定级方法
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